# Resources consuming Node-Red

**URL:** <https://discourse.nodered.org/t/resources-consuming-node-red/80867>\
**Category:** Hardware\
**Created:** [28 August 2023 17:00 UTC](https://discourse.nodered.org/t/resources-consuming-node-red/80867 "2023-08-28T17:00:50Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Dalen98](https://avatars.discourse-cdn.com/v4/letter/d/f9ae1b/32.png) [@Dalen98](https://discourse.nodered.org/u/Dalen98)\
**Post date:** [28 August 2023 17:00 UTC](https://discourse.nodered.org/t/resources-consuming-node-red/80867/1 "2023-08-28T17:00:50Z")

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Good morning to all readers of this query, I put them in context, I use S7 nodes very often, Modbus to be able to read PLC variables or other devices that support these protocols, but my query is how many variables can I have at most? reading at the same time, because I don't think the number of variables is infinite, and I think this will depend on the characteristics (ram, storage) of the device hosting the red node.

So how do I know if my hardware features can support all the variables read by node red, or how do I know how much ram or how much space my node red application consumes?

I hope I have made myself understood, thanks in advance.

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**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [28 August 2023 22:53 UTC](https://discourse.nodered.org/t/resources-consuming-node-red/80867/2 "2023-08-28T22:53:43Z")

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This is pretty much a "how long is a piece of string" question.

Maybe you should start with how many registers and how many external PLCs/devices do you _need_ to access. Then we can tell you of the pitfalls and gotchas to look out for.

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [27 October 2023 22:53 UTC](https://discourse.nodered.org/t/resources-consuming-node-red/80867/3 "2023-10-27T22:53:50Z")

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